Abstract: A RV holding tank disposal system for disposing of waste more quickly, cleaner and more sanitarily. The RV holding tank disposal system includes a duct assembly including a first pipe with inlet and outlet ends and a bore extending therethrough, a second pipe with an open first end, a second end, and a bore extending therethrough with the second pipe in operable communication with the first pipe, and a flexible hose with open first and second ends and a bore extending therethrough with the flexible hose fastened at the inlet end of the first pipe; a holding tank connector assembly connected to the duct assembly and adapted to be removably connected to a RV sewage holding tank; and a sewer adapter attachable to the duct assembly and adapted to be removably disposed in a sewer inlet.